Grain protein concentration and harvestable protein under future climate conditions. A study of 108 spring barley accessions.

Autor:	Ingvordsen CH; Atmospheric Environment, DTU Environmental engineering, Technical University of Denmark, Building 115, DK - 2800 Kgs. Lyngby, Denmark cathrine.ingvordsen@csiro.au., Gislum R; Department of Agroecology, AU-Flakkebjerg, Aarhus University, Forsøgsvej 1, DK-4200 Slagelse, Denmark., Jørgensen JR; Department of Agroecology, AU-Flakkebjerg, Aarhus University, Forsøgsvej 1, DK-4200 Slagelse, Denmark., Mikkelsen TN; Atmospheric Environment, DTU Environmental engineering, Technical University of Denmark, Building 115, DK - 2800 Kgs. Lyngby, Denmark., Stockmarr A; Department of Applied Mathematics and Computer Science, Technical University of Denmark, Matematiktorvet, Bld. 324, 2800 Kgs. Lyngby, Denmark., Jørgensen RB; Atmospheric Environment, DTU Environmental engineering, Technical University of Denmark, Building 115, DK - 2800 Kgs. Lyngby, Denmark.
Jazyk:	angličtina
Zdroj:	Journal of experimental botany [J Exp Bot] 2016 Apr; Vol. 67 (8), pp. 2151-8. Date of Electronic Publication: 2016 Feb 17.
DOI:	10.1093/jxb/erw033
Abstrakt:	In the present study a set of 108 spring barley (H. vulgare L.) accessions were cultivated under predicted future levels of temperature and [CO2] as single factors and in combination (IPCC, AR5, RCP8.5). Across all genotypes, elevated [CO2] (700 ppm day/night) slightly decreased protein concentration by 5%, while elevated temperature (+5 °C day/night) substantially increased protein concentration by 29%. The combined treatment increased protein concentration across accessions by 8%. This was an increase less than predicted from strictly additive effects of the individual treatments. Despite the increase in grain protein concentration, the decrease in grain yield at combined elevated temperature and elevated [CO2] resulted in 23% less harvestable protein. There was variation in the response of the 108 accessions, which might be exploited to at least maintain if not increase harvestable grain protein under future climate change conditions. (© The Author 2016. Published by Oxford University Press on behalf of the Society for Experimental Biology. All rights reserved. For permissions, please email: journals.permissions@oup.com.)
Databáze:	MEDLINE
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